A method for manufacturing a capacitor for an automobile

Abstract

The present invention relates to a method for manufacturing an automobile capacitor, and relates to the technical field of capacitors, which includes a shell, a capacitor body arranged in the shell at intervals, and a potting glue poured into the inner cavity of the shell to wrap the capacitor body, the two ends of the capacitor body are respectively provided with a first contact piece and a second contact piece extending from the shell, a heat dissipation hole is provided at the bottom of the shell, and a metal heat sink for dissipating heat for the first contact piece and the second contact piece is arranged in the heat dissipation hole; the metal heat sink is provided with a stepped groove in the circumference, and the shell has an embedded convex ring matched with the stepped groove at the heat dissipation hole. With the above structure, by providing a metal heat sink, the heat of the capacitor body can be dissipated through the metal heat sink, thereby improving the heat dissipation effect of the capacitor and making the capacitor less prone to damage.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a method for manufacturing an automobile capacitor. Background Art

[0002] Automotive capacitors are important components in automotive electronic systems. Together with other electronic components, they form a complex circuit system to realize various functions of the car.

[0003] A capacitor generally includes a housing, a capacitor body installed in the housing and encapsulated by a potting compound, and contacts extending from the capacitor body to the outside of the housing. In the prior art, the housing is generally made of plastic, and the capacitor body is completely sealed inside the housing by the potting compound. Since the capacitor body generates heat when working, it can only be dissipated through the housing, which has a low heat dissipation efficiency and is prone to damage to the capacitor. Summary of the invention

[0004] In order to improve the heat dissipation efficiency of an automobile capacitor, the present invention provides a method for manufacturing an automobile capacitor.

[0005] In a first aspect, the present invention provides an automotive capacitor, which adopts the following technical solution:

[0006] A car capacitor comprises a shell, a capacitor body arranged in the shell at intervals, and a potting compound poured into the inner cavity of the shell to wrap the capacitor body, wherein the two ends of the capacitor body are respectively provided with a first contact piece and a second contact piece extending from the shell, a heat dissipation hole is provided at the bottom of the shell, and a metal heat sink for dissipating heat for the first contact piece and the second contact piece is arranged in the heat dissipation hole; the metal heat sink is circumferentially provided with a stepped groove, and the shell has an engaging convex ring at the heat dissipation hole to cooperate with the stepped groove.

[0007] By adopting the above technical solution, a metal heat sink is arranged on the shell. The metal heat sink has good heat dissipation efficiency, so that the capacitor can not only dissipate heat through the shell surface, but also accelerate the heat dissipation through the metal heat sink, thereby quickly reducing the temperature of the capacitor.

[0008] Furthermore, by providing the stepped grooves, the metal heat sink can expand after the capacitor is heated, so that the metal heat sink and the shell can be tightly combined, the sealing is improved, and water vapor is not easy to enter.

[0009] Optionally, one end of the capacitor has a first electrode and the other end has a second electrode, the first contact piece has a first heat conductive sheet connecting the first electrode of the adjacent capacitor, and the first heat conductive sheet is directly opposite to the metal heat sink.

[0010] By adopting the above technical solution, the heat generated by the first electrodes of all capacitors can be transferred from the first heat conducting sheet to the metal heat sink and quickly dissipated through the metal heat sink.

[0011] Optionally, the second contact piece includes a second thermal conductive piece connecting the second electrode of the adjacent capacitor, an extended thermal conductive piece located on one side of the first electrode, and a connecting piece connecting the second thermal conductive piece and the extended thermal conductive piece, and the extended thermal conductive piece is opposite to the metal heat sink.

[0012] By adopting the above technical solution, the heat generated by the second electrodes of all capacitors can be transferred from the second heat conducting plate, the connecting plate and the extended heat conducting plate to the metal heat sink in sequence, and the heat can be quickly dissipated through the metal heat sink.

[0013] Optionally, heat dissipation fins are arranged at intervals on the surface of the second heat conducting sheet, and the heat dissipation fins have heat dissipation portions that protrude toward the inner wall of the shell so as to guide heat to the shell.

[0014] By adopting the above technical solution, the heat generated by the second electrode can be dissipated through the metal heat sink, and can also be directly transferred to the shell through the heat dissipation fins and dissipated from the shell. By providing the heat dissipation fins, the distance between the second heat conductive sheet and the shell is reduced, further improving the heat dissipation efficiency of the capacitor.

[0015] Optionally, a spacer heat conductive sheet is provided between the side walls of adjacent capacitor bodies, and the spacer heat conductive sheet is snap-fitted with the first heat conductive sheet.

[0016] By adopting the above technical solution, the heat generated between adjacent capacitors can be transferred to the first heat conductive sheet through the spacer heat conductive sheet and dissipated through the metal heat sink, so that the temperature between adjacent capacitors can be reduced.

[0017] Optionally, both the first contact piece and the second contact piece are provided with a potting hole for the potting glue to flow out.

[0018] By adopting the above technical solution, during the potting process, the potting glue can flow through the potting holes, so that the potting glue in the capacitor housing is evenly distributed, thereby improving the potting effect.

[0019] Optionally, the shell has an insertion port penetrating through the inner and outer surfaces for the first contact piece and the second contact piece to extend out, and the first contact piece and the second contact piece are both provided with sealing gaskets that abut against the insertion port.

[0020] By adopting the above technical solution, a sealing gasket is arranged at the plug interface. When the capacitor and other parts are installed in the shell and pressed tightly, the sealing gasket can seal the plug interface, so that the potting glue is not easy to leak from the plug interface during the potting process.

[0021] In a second aspect, the present application provides a method for manufacturing an automotive capacitor, using the following technical solution:

[0022] A method for manufacturing an automotive capacitor, applied to the above-mentioned automotive capacitor, comprises:

[0023] Obtaining model information of the capacitor and inner cavity image information of the shell;

[0024] Determine the width value of the capacitor according to the model information of the capacitor;

[0025] Determine the setting position of the spacer heat conductive sheet on the first contact sheet according to the width value of the capacitor;

[0026] Control the clamping device to install the spacer heat conductive sheet on the first contact sheet according to the setting position, and place the capacitor body between adjacent spacer heat conductive sheets;

[0027] Determine the surrounding installation position of the second contact piece according to the reference point preset on the first contact piece, and control the clamping device to install the second contact piece on the capacitor body according to the surrounding installation position;

[0028] Determine the position of the plug interface according to the intracavity image information and the preset plug interface features;

[0029] Clean the inner cavity of the shell using a preset inner cavity cleaning method of the shell, and control the clamping device to insert the assembled first contact piece and the second contact piece of the capacitor body into the insertion interface position;

[0030] The preset filling device is controlled by a preset air bubble removal filling method to fill the filling glue into the inner cavity of the shell, and the capacitor after filling is inspected by a preset filling quality detection method.

[0031] By adopting the above technical solution, during the process of manufacturing the capacitor, the inside of the shell is first cleaned so that the potting glue can be evenly distributed in the inner cavity of the shell and combined with the inner wall of the shell, so that the sealing effect of the potting is better, and a specific potting method and potting quality detection method are used to pot the capacitor, so as to further improve the potting effect of the capacitor.

[0032] Optional methods for removing bubbles and filling glue include:

[0033] Determine the volume of the inner cavity of the shell according to the inner cavity image information and the preset proportional reference point;

[0034] Match the amount of potting glue according to the volume of the shell cavity and the preset volume of the internal parts;

[0035] Determine the potting hole position according to the assembled inner cavity image information and the preset potting hole features;

[0036] Determine the gap feature position between the internal parts and the circumferential inner wall of the shell according to the assembled inner cavity image information and the preset cavity features;

[0037] Control the potting device to inject half of the potting glue into the potting hole position, and inject the remaining potting glue into the gap feature position until the inner cavity of the shell is filled, and obtain the remaining potting glue amount;

[0038] If and only if the remaining glue injection amount is greater than 0, the vibration positions at the four corners of the gap feature position are determined according to the assembled inner cavity image information and the gap feature position;

[0039] Controlling a preset vibration device to be inserted into a vibration position to vibrate at a preset vibration frequency, and generating a bypass stirring path according to a characteristic position of the gap;

[0040] Controlling the vibration device to orbit along the characteristic position of the gap at a preset orbiting speed and vibrate at a vibration frequency according to the orbiting stirring path;

[0041] During the circling process of the vibration device, the remaining amount of the potting glue is injected into the characteristic position of the gap by sliding down the vibration device.

[0042] By adopting the above technical solution, during the potting process, the potting hole is first potted, and then the inner wall of the shell is potted circumferentially, so that the potting glue can be evenly distributed in the shell. In addition, during the potting process, the potting glue is vibrated and stirred by a vibration device, so that the bubbles in the potting glue can be discharged, thereby improving the potting effect.

[0043] Optional potting quality testing methods include:

[0044] During the glue filling process, the range image information at the plug interface of the shell is obtained within a preset unit time;

[0045] Determine whether glue leakage occurs based on range image information and preset potting glue features;

[0046] Based on the glue leakage phenomenon, the glue leakage location type is determined according to the range image information and the characteristics of the potting glue. The glue leakage location types include circumferential glue leakage and point glue leakage.

[0047] Based on the circumferential glue leakage, according to the plug interface position where the glue leakage occurs, a clamping position for a preset clamping device to clamp the internal parts directly opposite to the plug interface position is determined;

[0048] Controlling the pressing device to press at the pressing position to press the sealing gasket at the plug-in interface;

[0049] Based on the glue leakage point, the location of the glue leakage point is determined according to the range image information and the characteristics of the potting glue;

[0050] According to the preset touch force, the preset pick is controlled to pick and reset the sealing gasket at the leaking point, and the pressing device is controlled to press at the pressing position;

[0051] A preset auxiliary sealing ring is controlled to be sleeved on the plug-in interface position outside the shell so as to perform compression and sealing on the plug-in interface position from the outside of the shell.

[0052] By adopting the above technical solution, after the glue filling is completed, the plug interface position is checked. If there is glue leakage, the capacitor and other components in the shell are compressed according to the glue leakage position, so that the sealing gasket is further compressed at the plug interface, making it difficult for the plug interface to leak glue.

[0053] In summary, the present application includes at least one of the following beneficial technical effects:

[0054] 1. A metal heat sink is provided on the shell. The metal heat sink has good heat dissipation efficiency, so that the capacitor can not only dissipate heat through the shell surface, but also accelerate the heat dissipation through the metal heat sink, thereby quickly reducing the temperature of the capacitor;

[0055] 2. The heat generated by the second electrodes of all capacitors can be transferred from the second heat conductive sheet, the connecting sheet and the extended heat conductive sheet to the metal heat sink in sequence, and the heat generated by the second electrodes can be transferred from the second heat conductive sheet, the connecting sheet and the extended heat conductive sheet to the metal heat sink in sequence, and finally all heat is quickly dissipated through the metal heat sink;

[0056] 3. By arranging heat dissipation fins at intervals on the second heat conducting sheet, the distance between the second heat conducting sheet and the housing is reduced, further improving the heat dissipation efficiency of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the overall structure of an automotive capacitor according to an embodiment of the present invention;

[0058] Figure 2 is an exploded view of the inner cavity components of the housing in an embodiment of the present invention;

[0059] Figure 3 is a schematic structural diagram of the housing at the heat dissipation hole in an embodiment of the present invention;

[0060] Figure 4 is a schematic structural diagram of the housing at the plug interface in an embodiment of the present invention;

[0061] Figure 5 is a method flow chart of a method for manufacturing an automotive capacitor in an embodiment of the present invention;

[0062] Figure 6 is a method flow chart of the bubble removal and glue filling method in an embodiment of the present invention;

[0063] Figure 7 is a method flow chart of a potting quality detection method in an embodiment of the present invention;

[0064] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Shell; 11. Plug interface; 12. Heat dissipation hole; 121. Engaging convex ring; 13. Metal heat sink; 131. Step groove; 2. Capacitor body; 21. First electrode; 22. Second electrode; 3. First contact piece; 31. First thermal conductive sheet; 4. Second contact piece; 41. Second thermal conductive sheet; 42. Connecting piece; 43. Extended thermal conductive sheet; 44. Heat dissipation convex sheet; 45. Heat dissipation part; 5. Potting glue; 6. Contact; 7. Spacer thermal conductive sheet; 8. Potting hole; 9. Sealing gasket. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0066] The embodiment of the present application discloses an automotive capacitor.

[0067] Reference Figure 1 and Figure 2 A car capacitor includes a shell 1, a capacitor body 2, a first contact piece 3, a second contact piece 4 and a potting glue 5. The shell 1 is a hollow square box body, and has a plug-in port 11 that penetrates the inner and outer surfaces. The capacitor body 2 is installed in the inner cavity of the shell 1, and the first contact piece 3 and the second contact piece 4 are respectively connected to the two ends of the capacitor body 2 and extend from the plug-in ports 11 on both sides of the shell 1 to serve as the input and output ends of the current of the capacitor. After the capacitor body 2, the first contact piece 3 and the second contact piece 4 are installed on the shell 1, the potting glue 5 is used to pour glue into the inner cavity of the shell 1, so that the shell 1, the capacitor body 2, the first contact piece 3 and the second contact piece 4 are integrated to ensure the sealing and protect the capacitor body 2.

[0068] In this embodiment, there are multiple capacitors 2, which are arranged at intervals in the inner cavity of the housing 1. The capacitor 2 has a first electrode 21 and a second electrode 22, which are located at two ends of the capacitor 2 respectively.

[0069] The first contact piece 3 is connected to one side of the first electrode 21 of the capacitor 2 , and includes a first heat conductive sheet 31 connecting the first electrodes 21 of all the capacitors 2 and a contact 6 connected to the first heat conductive sheet 31 and extending out of the housing 1 .

[0070] The second contact piece 4 is connected to one side of the second electrode 22 of the capacitor 2, and the second contact piece 4 is C-shaped. The second contact piece 4 includes a second heat conductive sheet 41 connecting the second electrodes 22 of all the capacitors 2, a connecting sheet 42 connected to the second heat conductive sheet 41, an extended heat conductive sheet 43 connected to the connecting sheet 42, and a contact 6 connected to the second heat conductive sheet 41 and extending out of the housing 1. The connecting sheet 42 is located on the side wall of the capacitor 2 and is parallel to the side wall of the capacitor 2, the extended heat conductive sheet 43 is located on one side of the first electrode 21 of the capacitor 2 but is not connected to the first electrode 21, and the extended heat conductive sheet 43 is parallel to the first heat conductive sheet 31.

[0071] Combination Figure 1 , Figure 2 and Figure 3 Since the capacitor 2 generates heat during operation, the capacitor needs to have a heat dissipation structure to dissipate the heat. The housing 1 is provided with a heat dissipation hole 12 on the side wall near the first electrode 21, and a metal heat sink 13 is arranged in the heat dissipation hole 12. The metal heat sink 13 is made of a metal material with good heat dissipation ability. When the metal heat sink 13 is installed in the heat dissipation hole 12 and fixed by the potting glue 5, the metal heat sink 13 is directly opposite to the first heat conductive sheet 31 and the extended heat conductive sheet 43, so that the heat generated at both ends of the capacitor 2 can be transferred to the metal heat sink 13 through the first heat conductive sheet 31 and the extended heat conductive sheet 43 for heat dissipation.

[0072] Furthermore, the metal heat sink 13 is provided with a stepped groove 131 in the circumferential direction, and the housing 1 has a mating convex ring 121 at the heat dissipation hole 12 that cooperates with the stepped groove 131. When the glue is poured, the stepped structure at the heat dissipation hole 12 improves the sealing performance, and the potting glue 5 is not easy to leak from the heat dissipation hole 12. In addition, when the capacitor 2 is heated, the metal heat sink 13 can expand due to the heat, further reducing the gap between the metal heat sink 13 and the heat dissipation hole 12, thereby improving the sealing performance.

[0073] Reference Figure 1 and Figure 2 In addition to being able to dissipate heat from the extended heat conductive sheet 43, the heat generated at the second electrode 22 of the capacitor 2 can also be dissipated through the second heat conductive sheet 41. Heat dissipation fins 44 are arranged on the second heat conductive sheet 41 at intervals, and the heat dissipation fins 44 have a welding portion and a heat dissipation portion 45 connected to the welding portion. The welding portion is connected to the second heat conductive sheet 41 by welding, and the heat dissipation fins 44 protrude toward the inner wall of the housing 1 so that the second heat conductive sheet 41 can be closer to the housing 1 through the heat dissipation fins 44 to dissipate heat.

[0074] The gaps between adjacent capacitors 2 are also where heat accumulates, and heat dissipation needs to be performed there. A spacer heat conductive sheet 7 is provided between adjacent capacitors 2, and the spacer heat conductive sheet 7 is engaged with the first heat conductive sheet 31. The heat between adjacent capacitors 2 can be transferred to the first heat conductive sheet 31 through the spacer heat conductive sheet 7, and then transferred to the metal heat sink 13 through the first heat conductive sheet 31 for heat dissipation.

[0075] Furthermore, both the first contact piece 3 and the second contact piece 4 are provided with potting holes 8 , and during potting, the potting glue 5 can flow through the potting holes 8 , so that the potting glue 5 is evenly distributed.

[0076] Reference Figure 1 and Figure 4 In order to prevent the potting glue 5 from leaking out of the plug interface 11, the first contact piece 3 and the second contact piece 4 are both sleeved with a sealing gasket 9 at the plug interface 11, and the sealing gasket 9 abuts against the inner wall of the plug interface 11 to improve the sealing performance.

[0077] Based on the same inventive concept, an embodiment of the present invention provides a method for manufacturing an automotive capacitor.

[0078] Reference Figure 5 , a method for manufacturing an automotive capacitor comprises the following steps:

[0079] Step S100: obtaining model information of the capacitor 2 and inner cavity image information of the housing 1 .

[0080] The model information of capacitor 2 refers to the information of basic parameters such as length, width and height of capacitor 2. A scanning camera is set in the working area for manufacturing capacitors. Each capacitor 2 has a barcode containing model information. The scanning camera can scan the barcode to obtain the model information of capacitor 2.

[0081] The inner cavity image information refers to an image of the inner cavity of the shell 1 obtained by photographing the shell 1 for mounting the capacitor 2 through a camera arranged in a working area.

[0082] Step S101: determining a width value of the capacitor 2 according to the model information of the capacitor 2.

[0083] The model information of the capacitor 2 includes the width value parameter of the capacitor 2. By comparing the model information of the capacitor 2 with the preset model parameter table, the width of the capacitor 2 can be obtained. The model parameter table includes the correspondence between the model of the capacitor 2 and the basic parameters corresponding thereto, which is a form pre-recorded and saved in the system by the technician, and will not be described in detail here.

[0084] Step S102 : determining the location of the spacer heat conductive sheet 7 on the first contact sheet 3 according to the width of the capacitor 2 .

[0085] A spacer heat conductive sheet 7 is required between each adjacent capacitor body 2 for heat dissipation, and the capacitor bodies 2 are closely arranged in the inner cavity of the shell 1. Therefore, the setting position of the spacer heat conductive sheet 7 is related to the width value of the capacitor body 2, and the spacing between adjacent spacer heat conductive sheets 7 is the width value of the capacitor body 2.

[0086] Step S103 : controlling the clamping device to install the spacer heat conductive sheet 7 on the first contact sheet 3 according to the setting position, and placing the capacitor 2 between adjacent spacer heat conductive sheets 7 .

[0087] After determining the location of the spacer heat conductive sheet 7 , the system controls the clamping device to fix the spacer heat conductive sheet 7 on the first contact sheet 3 at intervals, and then sequentially installs the capacitor 2 on the adjacent spacer heat conductive sheet 7 .

[0088] Step S104: determining that the second contact piece 4 is at a surrounding installation position according to a reference point preset on the first contact piece 3, and controlling the clamping device to install the second contact piece 4 on the capacitor body 2 according to the surrounding installation position.

[0089] The surrounding installation position refers to the installation position of the second contact piece 4 on the capacitor body 2, and the capacitor body 2 is arranged around the outside of the capacitor body 2. The reference point is a fixed position point on the first contact piece 3, which is used to refer to the second contact piece 4 for installation on the capacitor body 2.

[0090] In this embodiment, the end edge of the first contact piece 3 is flush with the end edge of the second contact piece 4, so the point on the end of the first contact piece 3 is used as a reference point, and the edge of the first contact piece 3 is flush with the edge of the second contact piece 4 when the second contact piece 4 is clamped by a clamping device and installed on the capacitor body 2.

[0091] Step S105: determining the position of the plug-in port 11 according to the intracavity image information and the preset features of the plug-in port 11 .

[0092] The position of the plug port 11 refers to the position of the plug port 11 opened in the inner cavity of the housing 1 for the contact 6 of the first contact sheet 3 and the contact 6 of the second contact sheet 4 to pass through the housing 1. By analyzing and identifying the inner cavity image information, the position of the plug port 11 in the inner cavity of the housing 1 is determined. Only when the position of the plug port 11 is determined, the assembled capacitor body 2 can be installed into the housing 1.

[0093] Step S106: cleaning the inner cavity of the shell 1 by a preset inner cavity cleaning method of the shell 1, and controlling the clamping device to insert the assembled first contact piece 3 and the second contact piece 4 of the capacitor body 2 into the position of the plug-in port 11.

[0094] Before installing the assembled capacitor body 2 into the inner cavity of the shell 1, the inner cavity of the shell 1 needs to be cleaned to remove impurities and oil stains in the inner cavity to improve the potting quality of the potting glue 5. Here, the inner cavity of the shell 1 is cleaned by a cleaning method. The cleaning method of the inner cavity of the shell 1 will not be described here, and will be described in detail in subsequent embodiments.

[0095] Step S107: controlling a preset filling device to fill the filling glue 5 into the inner cavity of the housing 1 by a preset bubble removal filling glue method, and inspecting the capacitor after filling glue by a preset filling quality detection method.

[0096] After the assembled capacitor body 2 is installed into the housing 1, the step of glue pouring begins. Here, a bubble-removing glue pouring method is used for glue pouring. The bubble-removing glue pouring method is not described here in detail and will be described in detail in the subsequent embodiments. The bubble-removing glue pouring method is used for glue pouring, and the potting glue 5 can be evenly distributed and has fewer bubbles.

[0097] After the glue filling is completed, the glue filling quality needs to be checked to determine whether there is glue leakage to ensure the sealing effect of the capacitor body 2. The capacitor is tested by a potting quality detection method, which will not be described in detail here and will be described in detail in subsequent embodiments.

[0098] Reference Figure 6 The bubble removal and glue filling method comprises the following steps:

[0099] Step S200: determining the inner cavity volume of the shell 1 according to the inner cavity image information and a preset proportional reference point.

[0100] The scale reference point is a fixed position point within the working area set by the technician, which is used as a reference point for camera shooting to determine the image ratio of the captured image. It will not be described in detail here.

[0101] The volume of the inner cavity of the housing 1 refers to the volume of the space in the inner cavity of the housing 1 for the assembled capacitor 2 to be installed. The image ratio when the camera is shooting can be determined first through the inner cavity image information and the ratio reference point, and then the basic dimensions of the inner cavity of the housing 1 in the inner cavity image information can be determined through the inner cavity image information, including length, width and height. Finally, the actual length, width and height dimensions of the inner cavity of the housing 1 can be determined through the image ratio, so that the volume of the inner cavity of the housing 1 can be determined.

[0102] Step S201: matching the amount of potting glue 5 according to the inner cavity volume of the housing 1 and the preset internal component volume.

[0103] The volume of the internal parts refers to the sum of the volumes of the capacitor body 2, the first contact piece 3 and the second contact piece 4. The volumes of the capacitor body 2, the first contact piece 3 and the second contact piece 4 are all fixed reference parameters, which will not be described in detail here.

[0104] The potting amount refers to the volume of the potting glue 5 poured into the inner cavity of the housing 1 .

[0105] By calculating the difference between the volume of the inner cavity of the housing 1 and the volume of the internal parts, the remaining volume of the inner cavity of the housing 1 after installing the capacitor 2 and other parts can be determined, and the amount of potting glue 5 is consistent with the remaining volume.

[0106] Step S202: determining the position of the potting hole 8 according to the assembled inner cavity image information and the preset features of the potting hole 8.

[0107] The position of the potting hole 8 refers to the position of the potting hole 8 in the housing 1 after the capacitor 2 and other components are installed in the inner cavity of the housing 1. By performing image recognition analysis on the inner cavity image information, the features of the potting hole 8 can be found in the inner cavity image information, and then the position of the potting hole 8 in the actual inner cavity of the housing 1 can be determined by the image ratio.

[0108] Step S203: determining the characteristic position of the gap between the internal parts and the circumferential inner wall of the shell 1 according to the assembled inner cavity image information and the preset cavity features.

[0109] After the capacitor 2 and other components are installed in the housing 1, there is still a gap between the capacitor 2 and other components and the inner wall of the inner cavity of the housing 1. The position of the gap in the inner cavity of the housing 1 is the gap characteristic position.

[0110] Consistent with the method of step S202 , the characteristic position of the gap in the inner cavity of the shell 1 can be determined by performing image recognition analysis on the inner cavity image information.

[0111] Step S204: control the potting device to inject half of the potting glue 5 into the potting hole 8, and inject the remaining potting glue 5 into the gap feature position until the inner cavity of the shell 1 is filled, and obtain the remaining potting glue 5.

[0112] After determining the position of the potting hole 8 and the characteristic position of the gap, in order to make the potting glue 5 evenly distributed in the inner cavity, the potting hole 8 is firstly potted, and half of the potting glue 5 is injected into the potting hole 8. Then, the characteristic position of the gap is potted, and the remaining amount of potting glue 5 is injected therein.

[0113] The remaining potting glue volume refers to the amount of potting glue 5 remaining after the potting hole 8 and the gap characteristic position are filled with potting glue 5. When there are a large number of bubbles in the poured potting glue 5, the potting glue 5 may be filled before it is completely used up. Therefore, the bubbles in the housing 1 can be determined by the remaining potting glue 5. When pouring the potting glue 5, a specific pouring device is used, which has a scale, and the system can read the scale to determine the remaining amount of potting glue therein.

[0114] Step S205: When and only when the remaining glue injection amount is greater than 0, determine the vibration positions at the four corners of the gap characteristic position according to the assembled inner cavity image information and the gap characteristic position.

[0115] If the remaining potting glue amount is not greater than 0, it means that there are fewer bubbles injected into the inner cavity of the shell 1 and the potting glue 5 can be fully injected into the inner cavity of the shell 1 .

[0116] If the remaining potting glue amount is greater than 0, it means that there are many bubbles injected into the inner cavity of the shell 1, so that a part of the potting glue 5 cannot be injected into the inner cavity of the shell 1. At this time, the potting glue 5 in the inner cavity of the shell 1 needs to be exhausted.

[0117] In this embodiment, by inserting a vibration device into the characteristic position of the gap, the vibration device can vibrate the potting glue 5 , thereby promoting the exhaust of the potting glue 5 .

[0118] The vibration position is a position in the gap characteristic position for the vibration device to be inserted and vibrate, and in this embodiment, it is the four corners of the gap characteristic position. By performing image recognition analysis on the inner cavity image information, the positions of the four corners, i.e., the vibration position, can be determined from the gap characteristic position.

[0119] In this embodiment, the vibrating device is in the form of a thin and elongated needle-shaped vibrating needle.

[0120] Step S206: Control a preset vibration device to be inserted into the vibration position to vibrate at a preset vibration frequency, and generate a bypass stirring path according to the gap feature position.

[0121] The vibration frequency is the frequency of the vibration device set by the technician to vibrate and exhaust the potting glue 5. Vibrating at the vibration frequency can promote the exhaust of the potting glue 5, which will not be elaborated here.

[0122] The circumferential stirring path is the path along which the vibration device moves in the gap characteristic position along the circumferential direction of the inner cavity of the housing 1. The circumferential stirring path is related to the distribution of the gap characteristic position. The gap characteristic position is a square annular gap position, so the circumferential stirring path is also a square annular path.

[0123] Step S207: Control the vibration device to bypass along the gap characteristic position at a preset bypass speed according to the bypass stirring path, and vibrate at a vibration frequency.

[0124] When exhausting the potting glue 5 in the inner cavity of the shell 1, the vibrating device is first vibrated at the vibration positions at the four corners, and the system then controls the vibrating device to detour along the detour stirring path at the detour speed. During the detour, the vibrating device moves and vibrates. The detour speed is the moving speed of the vibrating device when it detours in the gap characteristic position set by the technician, and will not be described in detail here.

[0125] Step S208: During the circling process of the vibration device, the remaining amount of the potting glue 5 is injected into the gap feature position by sliding down the vibration device.

[0126] During the vibration device's orbit, bubbles are discharged from the potting glue 5 in the inner cavity of the shell 1, and the remaining potting glue 5 can be continuously injected into the shell 1. The injection method is to slide the potting glue 5 down along the vibration device into the inner cavity of the shell 1 through the injection device.

[0127] Reference Figure 7 , the potting quality detection method includes the following steps:

[0128] Step S300: During the glue filling process, the range image information at the plug interface 11 of the housing 1 is obtained within a preset unit time.

[0129] The range image information refers to the image of the housing 1 at the plug interface 11 obtained by the camera. When the camera obtains the image here, it is necessary to take multiple images per unit time during the glue filling process.

[0130] Step S301: determining whether glue leakage occurs according to the range image information and the preset features of the potting glue 5 .

[0131] Perform image recognition analysis on multiple range feature images to identify whether there are features in the image that are the same as the features of the potting glue 5 to determine whether glue leakage occurs. If glue leakage occurs, it needs to be processed.

[0132] Step S302: Based on the glue leakage phenomenon, determine the glue leakage location type according to the range image information and the characteristics of the potting glue 5. The glue leakage location type includes circumferential glue leakage and point glue leakage.

[0133] If there is no glue leakage, no treatment is required. When glue leakage occurs, the type of the glue leakage position should be determined first. Because the sealing gasket 9 is not pressed tightly or one corner is pressed crooked, glue leakage may occur all around the plug interface 11 or a certain position of the plug interface 11 may leak glue.

[0134] Step S3031: Based on the circumferential glue leakage, a clamping position for a preset clamping device to clamp internal parts opposite to the position of the plug interface 11 is determined according to the position of the plug interface 11 where the glue leakage occurs.

[0135] If the glue leaks all around, it means that the sealing gasket 9 is not pressed well. At this time, the pressing device applies pressure to the pressing position so that the sealing gasket 9 can be pressed tightly on the plug-in port 11. The pressing position is the position on the capacitor body 2 and other parts in the inner cavity of the housing 1 where the pressing device applies pressure. The pressing position is directly opposite to the plug-in port 11.

[0136] Step S30311: Control the pressing device to press at the pressing position to press the sealing gasket 9 to the plug-in port 11 position.

[0137] When the clamping position is determined, pressure is applied to the clamping position through the clamping device.

[0138] Step S3032: Based on the glue leakage point, the location of the glue leakage point is determined according to the range image information and the characteristics of the potting glue 5.

[0139] If glue is leaking at every position of the plug interface 11, the system needs to first determine the position of the glue leaking point. The glue leaking point position is the position point where glue leakage occurs at the plug interface 11. By performing image recognition analysis on the range image information, the position where the potting glue 5 feature exists in the range image information is the glue leaking point position.

[0140] Step S30321: Control the preset pick according to the preset touch force to pick and reset the sealing gasket 9 at the leaking point, and control the clamping device to clamp at the clamping position.

[0141] In the case of glue leakage at a single point, it may be that the sealing gasket 9 is crooked. At this time, the system can control the pick to move the sealing gasket 9 at the position of the glue leakage point so that the sealing gasket 9 can be reset. After the sealing gasket 9 is reset, the same as step S30311, the pressing device applies pressure to the pressing position.

[0142] Step S30322: Control a preset auxiliary sealing ring to be sleeved on the plug interface 11 outside the shell 1 to compress and seal the plug interface 11 from the outside of the shell 1 .

[0143] The auxiliary sealing ring is used to perform auxiliary sealing on the plug interface 11 . The auxiliary sealing ring is annular and can be sleeved on the contact 6 and can block the plug interface 11 outside the housing 1 .

[0144] When the pressing device applies pressure to the pressing position, the system simultaneously sets an auxiliary sealing ring on the contact 6 and presses the auxiliary sealing ring on the plug interface 11, so that the plug interface 11 can be sealed inside and outside. When the potting glue 5 solidifies, the auxiliary sealing ring is removed.

[0145] The method for cleaning the inner cavity of the housing 1 comprises the following steps:

[0146] Step S400: matching the amount of cleaning water used to clean the inner cavity of the shell 1 according to the inner cavity volume of the shell 1.

[0147] The amount of cleaning water used refers to the amount of cleaning water used to clean the inner wall of the housing 1. The amount of cleaning water used is proportional to the volume of the inner cavity of the housing 1.

[0148] Step S401: Determine the amount of detergent to be added to the washing water according to the amount of washing water used and a preset mixing ratio.

[0149] The amount of cleaning agent used refers to the amount of cleaning agent mixed with cleaning water for cleaning the inner cavity of the housing 1 .

[0150] The mixing ratio is the mixing ratio of cleaning agent to cleaning water set by the technicians to enable the cleaning agent to achieve the maximum cleaning effect, which will not be elaborated here.

[0151] After the amount of cleaning water used is determined, the amount of cleaning agent used can be determined based on the amount of cleaning water used and the mixing ratio.

[0152] Step S402: Control the preset coating device to coat half of the used amount of the cleaning agent on the inner wall of the shell 1 , and control the coating device to wipe circumferentially along the inner wall of the shell 1 .

[0153] In this embodiment, instead of adding all the cleaning agents into the cleaning water at once for mixing, a part of the cleaning agents is first applied to the inner wall of the inner cavity of the shell 1 by the application device, and the application device is controlled to wipe repeatedly in the circumferential direction.

[0154] The stubborn oil stains on the inner wall of the shell 1 may not be removed well by directly using cleaning water, and a large amount of cleaning water is required. Instead, the stubborn oil stains on the inner wall can be effectively removed by first applying a cleaning agent and then wiping with a coating device.

[0155] Step S403: adding the remaining half of the cleaning agent to the cleaning water, and controlling the water spraying device to spray water circumferentially on the inner wall of the shell 1.

[0156] During the wiping process of the coating device, the remaining half of the cleaning agent is added to the cleaning water, and the cleaning water is sprayed toward the inner wall of the shell 1 with a water spray device. At this time, the cleaning water can further remove the oil stains on the inner wall, and the cleaning water can be mixed with the half of the cleaning agent applied in advance to form the cleaning agent with the best cleaning effect.

[0157] Step S404: Continue to control the coating device to wipe circumferentially along the inner wall of the shell 1 to simultaneously stir the cleaning water in the inner cavity of the shell 1 so that the cleaning water and the cleaning agent are mixed, discharge the cleaning water from the plug port 11 after a preset cleaning time, and control the preset blowing device to blow dry the inner wall of the shell 1.

[0158] The smearing device can stir the cleaning water in the inner cavity of the shell 1 for wiping, so that the cleaning water and the cleaning agent are fully mixed, so that the cleaning effect of the cleaning water is best. At this time, the smearing device can wipe the inner wall with the most effective cleaning water.

[0159] The cleaning time is the time set by the technicians for cleaning the inner cavity of the shell 1, which will not be elaborated here.

[0160] After cleaning is completed, the cleaning water is discharged from the plug port 11, and the inner cavity of the housing 1 is blown dry by the blowing device.

[0161] The bubble removal and glue filling method also includes the following steps:

[0162] In this embodiment, the vibration device is formed by a sleeve of columns that rotate and cooperate with each other. Air holes are opened on the inner and outer columns. The air holes allow air to pass through but cannot allow the potting glue 5 to pass through. The inner column is connected to an air pump for suction. Under normal circumstances, the inner and outer air holes are misaligned and cannot be sucked. When suction is required, the outer column is rotated so that the inner and outer air holes are aligned, and the air pump can suck air through the air holes.

[0163] Step S500: Based on the remaining glue injection amount being greater than a preset reference remaining amount, the outer cylinder of the vibration device is controlled to rotate at a preset rotation angle so that the preset air vent is opened.

[0164] The reference remaining amount is a standard set by technicians to measure the number of bubbles in the potting glue 5, which will not be described in detail here. When the remaining potting glue amount is greater than the reference remaining amount, it means that there are too many bubbles in the potting glue 5, and the exhaust requirement cannot be met by vibration combined with stirring.

[0165] The rotation angle is a standard parameter of the vibration device. The misalignment angle of the air holes on the inner and outer sides of the vibration device is the rotation angle. The air holes can be opened by adjusting the rotation angle, which will not be elaborated here.

[0166] When the vibration device cannot meet the exhaust demand only by vibration combined with stirring, the system controls the outer cylinder of the vibration device to rotate so that the air vents are opened.

[0167] Step S501: When the vibration device moves along the circumferential stirring path, a preset air pump is controlled with a preset suction power to suction air from the air holes of the vibration device to remove bubbles in the potting glue 5 .

[0168] The suction power is the power of the air pump set by the technician to suck air into the air vents, which will not be elaborated here.

[0169] After the air holes are opened, the air pump simultaneously performs air suction while the vibrating device moves along the circumferential stirring path, so that the bubbles in the potting glue 5 can be sucked away through the air holes on the vibrating device, thereby accelerating the exhaust of the potting glue 5.

[0170] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for manufacturing an automotive capacitor, characterized in that: The invention relates to an automobile capacitor manufactured by applying the manufacturing method of an automobile capacitor, the automobile capacitor comprising a shell (1), a capacitor body (2) arranged in the shell (1) at intervals, and a potting glue (5) poured into the inner cavity of the shell (1) to wrap the capacitor body (2), the capacitor body (2) being provided with a first contact piece (3) and a second contact piece (4) extending out of the shell (1) at both ends, respectively, a heat dissipation hole (12) being provided at the bottom of the shell (1), and a metal heat dissipation sheet (13) for dissipating heat from the first contact piece (3) and the second contact piece (4) being arranged in the heat dissipation hole (12); the metal heat dissipation sheet (13) being provided with a stepped groove (131) in the circumferential direction, and the shell (1) having a mating convex ring (121) cooperating with the stepped groove (131) at the heat dissipation hole (12); One end of the capacitor (2) has a first electrode (21) and the other end has a second electrode (22), the first contact piece (3) has a first heat conducting piece (31) for connecting the first electrode (21) of an adjacent capacitor (2), and the first heat conducting piece (31) is directly opposite to the metal heat sink (13); A spacer heat conducting sheet (7) is provided between the side walls of adjacent capacitor bodies (2), and the spacer heat conducting sheet (7) is snap-fitted with the first heat conducting sheet (31); The first contact piece (3) and the second contact piece (4) are both provided with a potting hole (8) for the potting glue (5) to flow out; The housing (1) has an insertion port (11) penetrating through the inner and outer surfaces for the first contact piece (3) and the second contact piece (4) to extend out, and the first contact piece (3) and the second contact piece (4) are both provided with sealing gaskets (9) abutting against the insertion port (11); The method also includes: obtaining model information of the capacitor (2) and inner cavity image information of the housing (1); Determining a width value of the capacitor (2) according to model information of the capacitor (2); Determining the location of the spacer heat conductive sheet (7) on the first contact sheet (3) according to the width value of the capacitor (2); Controlling the clamping device according to the setting position, installing the spacer heat conductive sheet (7) on the first contact sheet (3), and placing the capacitor body (2) between adjacent spacer heat conductive sheets (7); Determining the surrounding installation position of the second contact piece (4) according to a reference point preset on the first contact piece (3), and controlling the clamping device to install the second contact piece (4) on the capacitor body (2) according to the surrounding installation position; Determining the position of the plug-in interface (11) according to the intracavity image information and preset features of the plug-in interface (11); The inner cavity of the housing (1) is cleaned using a preset method for cleaning the inner cavity of the housing (1), and the clamping device is controlled to insert the first contact piece (3) and the second contact piece (4) of the assembled capacitor body (2) into the position of the insertion port (11); A preset filling device is controlled by a preset air bubble removal filling method to fill the filling glue (5) into the inner cavity of the housing (1), and the capacitor after filling is inspected by a preset filling quality inspection method.

2. The method for manufacturing an automotive capacitor according to claim 1, characterized in that: The second contact piece (4) comprises a second heat conductive sheet (41) for connecting the second electrode (22) of the adjacent capacitor (2), an extended heat conductive sheet (43) located on one side of the first electrode (21), and a connecting sheet (42) for connecting the second heat conductive sheet (41) and the extended heat conductive sheet (43), wherein the extended heat conductive sheet (43) is directly opposite to the metal heat sink (13).

3. The method for manufacturing an automotive capacitor according to claim 2, characterized in that: Heat dissipation fins (44) are arranged at intervals on the surface of the second heat conducting sheet (41), and the heat dissipation fins (44) have heat dissipation portions (45) that protrude toward the inner wall of the shell (1) so as to direct heat toward the shell (1).

4. The method for manufacturing an automotive capacitor according to claim 1, characterized in that: The methods for removing bubbles and filling glue include: Determining the inner cavity volume of the shell (1) according to the inner cavity image information and a preset proportional reference point; Matching the amount of potting glue (5) according to the inner cavity volume of the housing (1) and the preset volume of the internal parts; Determining the position of the potting hole (8) according to the assembled inner cavity image information and the preset features of the potting hole (8); Determining the characteristic position of the gap between the internal parts and the circumferential inner wall of the shell (1) according to the assembled inner cavity image information and the preset cavity features; Controlling the pouring device to inject half of the pouring amount of the pouring glue (5) into the pouring hole (8), and injecting the remaining pouring glue (5) into the gap feature position until the inner cavity of the shell (1) is filled, and obtaining the remaining pouring amount of the pouring glue (5); If and only if the remaining glue injection amount is greater than 0, the vibration positions at the four corners of the gap feature position are determined according to the assembled inner cavity image information and the gap feature position; Controlling a preset vibration device to be inserted into a vibration position to vibrate at a preset vibration frequency, and generating a bypass stirring path according to a characteristic position of the gap; Controlling the vibration device to orbit along the characteristic position of the gap at a preset orbiting speed and vibrate at a vibration frequency according to the orbiting stirring path; During the circling process of the vibration device, the remaining amount of the potting glue (5) is injected into the characteristic position of the gap by sliding down the vibration device.

5. The method for manufacturing an automotive capacitor according to claim 1, characterized in that: Potting quality testing methods include: During the glue filling process, obtaining range image information at the plug interface (11) of the housing (1) within a preset unit time; Determining whether glue leakage occurs according to the range image information and the preset features of the potting glue (5); Based on the glue leakage phenomenon, the glue leakage location type is determined according to the range image information and the characteristics of the potting glue (5), and the glue leakage location type includes circumferential glue leakage and point glue leakage; Based on the circumferential glue leakage, according to the position of the plug interface (11) where the glue leakage occurs, a clamping position directly opposite to the plug interface (11) is determined for a preset clamping device to clamp the internal parts; Controlling the pressing device to press at the pressing position to press the sealing gasket (9) to the position of the plug interface (11); Based on the glue leakage point, the location of the glue leakage point is determined according to the range image information and the characteristics of the potting glue (5); According to a preset touch force, a preset pick is controlled to pick and reset the sealing gasket (9) at the position of the glue leakage point, and a pressing device is controlled to press at the pressing position; A preset auxiliary sealing ring sleeve is controlled to be arranged at the position of the plug interface (11) outside the shell (1) so as to perform compression sealing on the plug interface (11) position from the outside of the shell (1).

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